Pressure feeder for materials



Feb. 1, 1938. L. GATES PRES'SURE FEEDER FOR MATERIALS 5 Sheets-Sheet l Filed June l, 1937 NO@ Nl E @NN 5mm@ Feb. l, 1938. 1 l GATES 2,107,242

PRESSURE FEEDER FOR MATERIALS 3 Sheets-Sheet 2 Filed June l 1937 3.9 zo 7.9' 6U -l 75L 37 3.5,' 61. Z

a @a 563 INvsNron Feb. 1, 1938. l.. GATES PRESSURE FEEDER FOR MATERIALS '3 Sheets-Sheet 3 Filed June l, 1937 ll/i/i/l/ 1:' f o ATTORN EYS INVENTOR Lomff Patented F eb. 1, 1938 UNITED STATES PATENT OFFICE g 2,107,242 PRESSURE FEEDER Eon MATERIALS Lovell Gates, Idaho Falls, Idaho Application June 1, 193.7, serial N6. 145,847

12 Claims.

The invention relates to a pressure feeder for materials and more especially to a force feed gun or dispensing device. l

'I'he primary object of the invention is the provision of a device of this character, wherein fluids or semi-liquid materials can be'dspensed under pressure, thus enabling the use of Varying applicators for the applying of such materials by said device, for example, the application of tooth paste to a brush, shoe polish thereto, paint or other substance in a convenient manner and with dispatch 'as well as a uniform application of such material either in a cold or hot state as the occasion may require, the device being useful for service in giving hypodermics or for any other purpose for the dispensing of fluid under pressure.

Another object of the invention is the proteria] under pressure, particularly liquid andv semi-liquid substances, and inexpensive to manufacture.

With these and other objects in view, the invention consists in the features of construction, combination and arrangement of 'parts as will be hereinafter more fully described, illustrated in the accompanying drawings, which disclose the preferred embodiment of the invention and pointed out in the claims hereunto appended.

In the accompanying drawings:

Figure 1 is a plan view partly in section of a device constructed in accordance with the invention.

Figure 2 is an enlarged vertical longitudinal sectional View thereof with the brush removed and a modified form of cap fitted therewith when devoid of the carrying of the brush.

Figure 3 is a view similar to Figure 2 taken at substantially right angles thereto.

Figure 4 is an end view with an end cap removed.

Figure 5 is a sectional view on the line 5-5 of Figure 2 looking in the direction of the arrows.

Figure 6 is a sectional ,view on the line 6 6 of Figure 2 looking in the direction of the arrows.

Figure 7 is a sectional view on the line 'I--l of Figure 2 looking in the direction of the arrows,-4

Figure 8 is a sectional view on the line 8-8 of Figure 2 looking in the direction of the arrows. y

Figure 9 is a fragmentary plan view looking toward the back of the brush.v

Figure 10 is a fragmentary sectional view taken 5 on the line IIII-II! of Figure' 9 looking in the direction of the arrows. -f f Figure 11 is a fragmentary sectional view taken on the line II-II of Figure 2 looking in the direction of the arrows.

Figure 12 is a sectional view on the line` I2`I2 of Figure 1 looking in the direction of the arrows. Figure 13 is a view similar to Figure 3 showing the feed screw of the device reversed from that shown in Figures 1 and 2.

Figure 14 is a fragmentary pespective view of one end of the feed screw.r

Figure 15 is a fragmentary perspective view of the other end of the feedscrew.

Figure 16 is a fragmentary diagrammatic plan view showing the cooling system for the device.

Similar reference characters indicate corresponding parts throughout the several views in the drawings.

Referring to the drawings in detail, the gun or. device constituting the present invention comprises a cylindrical body or barrel I0 having a reduced 'end portion I I, this with the opposite end portion is provided with external threads I2 and I3, respectively, while at the inner end of the re--S duced yend portion II are slightly outset screw threads Il. 'I'he threads I3 and I4 permit;A the separable connection with the body or barrel Il) of end caps I5 and I6, respectively, there-being a supplemental or auxiliary cap I'I in substitutey for the cap I6, which latter is for a special purpose as will be hereinafter fully described. The body or barrel I0 is formed interiorly thereof throughout its length with axfiuid space vI8 having therein the directing Webs I9 effecting a circuitous course longitudinally of the said body or barrel and this space is accessible for the introduction and discharge of fluid to and from the same by plugged openings, the removable. plugs being indicated at 20. In this manner'hot ror cold uids can be admitted to thespace I8 for the heating or cooling of the contents of the body or barrel I0 at the option ofthe user of the device. The body or barrel I0 at the end having the threads I3 is formed with an axial neck extension 2| provided with an external coupling flange 22, the extension being formed with a central longitudinally directed bore fiat walled at 23 for a distance and round Walled at 24 for the remainder of its extent, the bore being generally indicated at 55 25. This flat walled portion 23 opens into a stepped internally threaded socket 26 forthe detachable engagement therein of different sizes of discharge ends of fluid containers (not shown) for the' delivery of the contents to the interior of the barrel through the bore 25 for a purpose presently described.

The neck extension 2| is a separable unit from the body or barrel I0 and is separably threaded therewith at 21. The extension 2| eccentric to the bore 25 is formed with a delivery passage 28 which opens into a stepped internally threaded socket 29 normally closed by a separable plug 30 and this socket 29 accommodates the separable connection therein of different sizes of discharge ends of containers for fluid to be introduced into the body or barrel |0 for a purpose presently described.

Rotatably fitted in the body or barrel at the reduced end Il thereof is a head 3| which at its inner end carries packing rings 32 snugly contacting with the interior of the body or barrel I0. Next to the inner end of the head 3| is a separator 33 removably threaded at 34 in the body or barrel l0 and effecting within this body or barrel I0 between it and the extension neck 2| a uid storage chamber 35. The separator 33 is held fast in the. body or barrel I0 by a set screw 36 threaded in the latter. Interposed between the head 3| and the separator 33 are thrust bearings 31 while interposed between the said head 3| and the reduced end portion of the body or barrel l0 are antifriction bearings 38. 'I'he head 3| is held tight within the end portion by a setting collar 39 engaged with the threads l2. 'I'his collar is formed with the fluted rim 4U, the utes or notches 4| therein selectively accommodating a retaining screw 42 engaged in the end portion of the body or barrel I0. Thus on adjustment of the collar 39 the head 3| can be held against end play and snugly and rotat ably retained within this end portion Releasably centered within the body or barrel I0 is a longitudinally directed feed screw 43 having the stepped opposite journal ends 44 and 45, respectively, the stepped end 44 being rounded while the stepped end 45 has round and flat faced portions 46 and 41, respectively. The head 3! at its inner end is formed with a central stepped socket 48 matching the stepped end 45 of the feed screw 43 for interfitting and locking with each other yet this socket 48 will rotatably accommodate the end 44 when the screw 43 is reversed for a purpose presently described. The ends 44 and 45 of the screw 43 are adapted for fitting in the bore 25 of the extension neck 2|. In oneposition of the feed screw 43, the end 44 lits the bore 25 and the end 46 lits the socket 48 in the head 3|, in this position the latter will be xed with the screw 43 while the body or barrel I6 can rotate relative to the screw and head. On reversal ofthe screw 43, as shown in Figure 13 of the drawings, it will freely rotate independently of the head 3| and the body or barrel I0 and is susceptible of direct rotary drive relative thereto.

Theseparator 33 rotatably accommodates the screw 43 centrally thereof in both positions under reversal oi the same and this separator is provided with a packing gland 49 about the screw 43 at its portion journaled therein to avoid leakage from the chamber 35 about the screw passed said separator 33. The separator 33 is provided with ports 50 which are uniformly spaced apart and converge in an outward direction for registry with the branches 5l of a discharge or dispensing passage 52 provided in the head 3l, this passage being communicative or common to a stepped internally threaded socket 53 for separable connectiontherein of varying dispensing implements, for example, a brush 54, its bristle carrying part 55 being releasably fitted with the stock of said brush 54 and this brush is provided with distributing leads 56 for uid litted with perforated rubber discharge nipples 51 interarranged with the bristles 56 of the brush for the dispensing of fluid therethrough. This brush can be utilized under variations in the construction thereof as a shoe polish dauber, a tooth brush, paint brush or liquid applying brush medium.

The branches 53 at their ends next to the ports 50 are removably fitted with liquid feed regulating nipples 53 to vary the flow of fluid to the passage 52 and control the slight velocity of such liquid to the brush or other implement fitted with the head 3|. The brush 54 when connected with the head 3| can be incased or enclosed by the cap |6. On removal of this brush 54 from the head 3|, the cap |1 is applied to the body or barrel i0 to conceal the said head 3|. 'I'he cap I5 when fitted with the body or barrel I6 encloses the neck extension 2|, these caps I5 and I1 being shown fitted with the body or barrel l0 in Figure 2 of the drawings.

The chamber 35 throughout its length in the body or barrel I6 has opposed flat parallel walls 63 and working within the said chamber is a force piston 6| which is threaded on the screw 43 and by reason of the opposed iiat wall 6l the said piston 46| can not rotate relative to the body or barrel but will by the screw 43 be fed longitudinally within the chamber 35. 'Ihis piston 6| is formed with passages 62 opening through opposite sides thereof and within such passages are arranged spring seated valves 63 which open in one direction only so thatuid delivered into the chamber 35 will freely ow through the passages 62 from one side of the piston to the other side thereof and will be checked against return ilow through said piston. The piston 6| is provided With packing rings 64 contacting with the interior surface of the chamber 35. When the piston 6| is advanced in one direction within the chamber 35 it exerts pressure upon the contents of the chamber for the dispensing of such contents through the passage 52 under pressure.k

The unit creating the extension neck 2| has a plugged opening 65, the plug being indicated at 66 and into this opening can be introduced a thermometer (not shown) so as to enable a user of the device to determine the temperature of the fluid within the chamber 35 in the body or barrel I6.

The piston 6| carries a packing gland 61 about the screw 43 and this screw at-the .point of journal of the same in the `passage 25 has cooperating therewith antifriction bearings 68.-

The body or barrel l0 for a distance vof the chamber 35 therein is formed with a sight window 69 covered by a glass 10 having indicia 1| and scale markings 12, respectively, so that the quantity of fluid within the chamber 35 can be determined thereby.

The head 3| intermediate thereof is formed with an annular channel 13 while hinged at 14 at diametrically opposite sides of the body or barrel i3 are latching dogs 15, these being shaped to fit within the channel 13 and carry spring pressed friction latching balls 16 which press into seats,|1 provided in said channel 13 for frictional snap latching `of the head 3| when the body or barrel ||l is rotated about the same.v These dogs l5 are releasably engaged in the channel 13 by the-rim 40 of the collar 39, this being clearly shown in Figures 3, 5 and 9 of the drawings.

Each end 44 and 45 of the screw 43 is bifurcated to form a clutching tip 'I8 so that a hollow drive shaft 'I9 can be clutched therewith and also these ends 44 and 45 are formed with delivery passages 80 so that fluid can be supplied from the shaft 19 into the chamber 35 between the piston 6| and the extension neck 2| for the filling of the chamber 35 with said fluid to be dispensed under pressure when the piston 6| is operated.

'I'he shaft 19 is coupled in the extension neck 2| by a coupling 8| and when the screw 43 is interfitted with the shaft 'i9 the said screw will be directly driven for the travel of the piston 6| within the chamber 35.

When the feed screw 43 is fixed with the head 3| and the latter is stationarily held by grasping the body or barrel I and turning movement imparted thereto, motion will be imparted to the piston 6|, the screw 43 being flxedly held with the head, this turning of the body causes the advancement of the piston 6| to place under pressure the contents of the chamber 35 for the dispensing of such contents under pressure.

Of course, it is understood that the brush 54 is merely illustrated in Figure 1 of the drawings to show an adaptation of an implement with the device because any other liquid applying implement can be associated with the device for the dispensing of fluid under pressure. An example of an implement is a hypodermic needle, a shoe polish dauber, a paint brush or the like may be used in connection with the said device for the applying of materials either in fluid state or semi-liquid. When power is to be transferred directly to the said screw 43, it is, of course,

understood that such screw is reversed from the position shown in Figure 2 to that shown in Figure 13 of the drawings whence the ends 44 and 45 will be reversed and the end 44 fitting in the socket 48 in the head 3| will become journaled therein. Thus the piston 6| will be advanced either by the turning of the screw 43 or the turning of the body or barrel ||J placing the contents of the chamber 35 under pressure and causing the dispensing of such contents in this state. The device when in association with material applying implements affords a force feeder for the material.

The passage 25 has located therein a fluid return check valve 82. On the hollow drive shaft 8| is fitted a drive pulley 83 for the transfer of power to the said shaft for driving purposes from any suitable source.

When the device is not in use, either the caps and l1 are applied or when the brush 54 or other implement is connected with the device then the caps |5 and I6 are applied to the body or barrel of said device.

What is claimed is:

1. A device of the kind described comprising a cylinder, end caps removably fitted to the cylinder, an extension neck separably fitted at one end of the cylinder and having separate inlets, a head rotatably fitted in the other end of the cylinder and having discharge passages opening into each other and through said head, a piston movably fitted within the cylinder and having passages therethrough, and a feed screw reverscylinder, end caps removably fltted to the cylinder, an extension neck separably tted at one end of the cylinder and having separate inlets, a head rotatably fitted in the other end of the cylinder and having discharge passages opening into each other and through said head, a piston movably fitted within the cylinder and having passages therethrough, a feed screw reversibly fitting the neck and head and threaded in the piston, and formations interiorly of the cylinder for engaging the piston for holding the latter against relative turning movement with respect to said cylinder.

3. A device of the kind described comprising a cylinder, end caps removably fitted to the cylinder, an extension neck separably fitted at one end of the cylinder and having separate inlets, a head rotatably fitted' in the other end of the cylinder and having discharge passages opening into each other and through said head, a piston movably fitted within the cylinder and having passages therethrough, a feed screw reversibly fitting the neck and head and threaded in the piston, formations interiorly of the cylinder for engaging the piston for holding the latter against relative turning movement withI respect to said cylinder, and a water jacket formation created Within the body of said cylinder.

4. A device of the kind described comprising a cylinder, end caps removably fitted to the cylinder, an extension neck separably tted at one end of the cylinder and having separate inlets, a head rotatably fitted in the other end of the cylinder and having discharge passages openinginto each other and through said head, a piston movably fitted within the cylinder and having passages therethroungh, a feed screw reversibly fitting the neck and head and threaded ln the piston, formations interiorly of the cylinder for engaging the piston for holding the latter against relative turning movement with respect to said cylinder, a water jacket formation created within the body of said cylinder, and meansV at one end of the feed screw for separably locking it with the head.

5. A device of the kind described comprising a cylinder, end caps removably fitted to the cylinder, an extension neck separatelyftted at one end of the cylinder and having yseparate inlets, a head rotatably fitted in the other end of the cylinder and having discharge passages opening into each other and through said head, a piston movably fitted within the cylinder and having passages therethrough, a feed screw reversibly fitting the neck and head and threaded in the piston, formations interiorly of the cylinder for engaging the piston for holding the latter against relative turning movement with respect to said cylinder, a water jacket formation created within the body of said cylinder, means at one end of the feed screw for separably locking it with the head, and valves located in thepassages in the piston and opening in one direction only.

6. A device of the kind described comprising av cylinder, end caps removably fitted to the cylinder, an extension neck separably fitted at one end of the cylinder and having separate inlets, a head rotatably fitted in the other end of the cylinder and having discharge passages opening into each other and through said head, a piston movably fitted within the cylinder and having passages therethrough, a feed screw reversibly ilttim the neck and head and threaded `in the piston, formations interiorly of the cylinder for engaging the piston for holding the latter against relative turning movement with respect to said cylinder, a water jacket formation created within the body of said cylinder, means at one end of the feed screw for separably locking it with the head, valves located in the passages in the piston and opening in one direction only, and friction latches carried by the cylinder and engageable with the head and ellecting snap action thereon when the said head is turned relative to the cylinder.

7. A device of the kind described comprising a cylinder, end caps removably fitted to the cylinder, an extension neck separably fitted at one end of the cylinder and having separate inlets, a hcadrotatably fitted in the other end of the cylinder and having discharge passages opening into each other and through said head, a piston movably fitted within the cylinder and having passages therethrough, a feed screw reversibly fitting the neck and head and threaded in the piston, formations interiorly of the cylinder for engagingthe piston for holding the latter against relative turning movement with respect to said cylinder, a water jacket formation created within the body of said cylinder, means at one end of the feed screw for separably locking it with the head, valves located in the passages in the piston and opening in one direction only, friction latches carried by the cylinder and engageable with the head and effecting snap action thereon when the said head is turned relative to the cylinder, and means fitting the cylinder for holding the head snugly within the same and maintaining the friction latches in operative position.

8. A device of the kind described comprising a cylinder, end caps removably fitted to the cyl- Inder, an extension neck separably fitted at one end of the cylinder and having separate inlets, a head rotatably fitted inthe other end of the cylinder and having discharge passages opening into each other and through said head, a piston movably fitted within the cylinder and having es therethrough, a feed screw reversibly fitting the neck and head and threaded in the piston, formations interiorly of the cylinder for engaging the piston for holding the latter against relative turning movement with respect to said cylinder, a water jacket formation created within the body of said cylinder, means at one end of the feed screw for separably locking it with the head, valves located in the passages in the piston and opening in one direction only, friction latches carried by the cylinder and engageable with the head and effecting snap action thereon when the said head is turned relative to the cylinder, means fitting the cylinder for holding the head snugly within the same and maintaining the friction latches in operative position, and means for the coupling of a power shaft with said feed screw and insertable in the neck. l

9. A device of the vkind described comprising a cylinder, end caps removably fitted to the cylinder, an extension neck separably fitted at one end of the cylinder and having separate inlets, a

head rotatably tted in the other end of the cylinder and having discharge passages opening into each other and through said head, a piston movably fitted within the cylinder and having passages therethrough, a feed screw reversibly fitting. the neck and head and threaded in the piston,

formations interiorly of the cylinder for engaging thepiston for holding the latter against relative ,turning movement with respect to said cylinder,

a water jacket formation created within the body of said cylinder, means at one end of the feed lscrew for separably locking it with the head,

valves located in the passages in the piston and opening in one direction only, friction latches carried by the cylinder and engageable with the head and effecting snap action thereon when the said head is turned relative to the cylinder, means f1tting the cylinder for holding the head snugly within the same and maintaining the friction latches in operative position,'means for the coupling of a power shaft with said feed screw and insertable in the neck, and a fitting withinthe cylinder between the piston and said head and held fast to said cylinder for journaling the feed screw. y

10. A device of the kind described comprising a cylinder, end caps removably fitted to the cylinder, an extension neck separately fitted at one end of the cylinder and having separate inlets, a head rotatably fitted in theother end of the cylinder and having discharge passages opening into each other and through said head, a piston movably fitted within the cylinder and having passages therethrough, ,a feed screw reversibly fitting the neck and head and threaded in the piston, formations interiorly of the cylinder for engaging the piston for holding the latter against relative turning movementwith respect to said cylinder, a water jacket formation created within the body of Said cylinder, means at one end of the feed screw for separately locking it with the head, valves located in the passages in the piston and opening in one direction only, friction latches carried by the cylinder'iand engageable with'the head and effecting snap action thereon when the said head is turned relative to the cylinder, means fitting the cylinder for holding the head snugly within the sameand maintaining the friction latches in operative position, means for the coupling of a power shaft with said feed screw and insertable in the neck, a lfitting within the cylinder between the piston and said head and held fast to said cylinder for journaling the feed screw, and a check return valve fitting within the neck. 4 y

11. A device of the kind described comprisingV a cylinder, end caps removably fitted to the cylinder, an extension neck separately fitted at one end of the cylinder and having separate inlets, a head rotatably fitted in the other end of the cylinder and having discharge passages' opening into each other and through said head, a piston movably fitted within the cylinder and having passages therethrough, a feed screw reversibly fitting the neck and head and threaded in the piston, formations interiorly of the cylinder for engagingthe piston for holding the latter against relative turning movement with respect to. said cylinder, a water jacket formation created within the body of said cylinder, means atone end of the feed screw for separately locking it with the head, valves located in the passages in the piston and opening in one direction only, friction latchescarried by the cylinder and engageable with the head and effecting snap action thereon when the said head is turned relative to the cylinder, means fitting the cylinder for holding the head snugly within the same -and maintaining the friction latches in o rative position, means for the coupling of a power shaft withsaid feed screw and insertable in the neck, a fltting within the cylinder between the piston and said head and held fast to said cylinder for journaling the feed screw, a check return valve tting within the neck, and packing rings carried by the piston and head, respectively.

12. A device ofthe kind described comprising a cylinder, end caps removably tted to the cylinder, an extension neck separably iltted at one end of the cylinder and having separate inlets, a head rotatably tted in the other end of the cylinder and having discharge passages opening into each other and through said head, a piston movably tted within the cylinder and having passages therethrough, a feed screw reversably fitting the neck and head and threaded in the piston, formations interiorly of the cylinder for engaging the piston for holding the latter against relative turning movement with respect to said cylinder, a water jacket formation created within the body of said cylinder, means at one end of the feed screw for separably locking it with the head,

valves located 'in the passages in the piston and opening in one direction only, friction latches carried by the cylinder and engageable with the head and effecting snap action thereon when the said head is turned relatively to the cylinder, means fitting the cylinder for holding the head snugly within the same and maintaining the friction latches in operative position, means for the coupling of a power shaft with said feed screw ,and insertable in the neck, a fitting within the cylinder between the piston and said head and held fast to said cylinder for journaling the feed screw, a check return valve fitting within the neck, packing rings carried by the piston and head, respectively, the said neck having an opening for accommodating a thermometer for presenting the latter to the interior of' said cylinder, and a plug closing said opening.

LOVELL GATES. 

